Leather-staking machine.



No. 675,732. Patented lune 4, 190i. G. A. HENRY.

LEATHER STAKING MACHINE.

(Application filed Jan. 22, 1901.)

(No Model.)

WITNESSES.-

By I m: Monnn'mgas 20., WOTMITNO" wumncron. u c.

UNITED STATES PATENT FFICE.

GEORGE A. HENRY, OF WILMINGTON,,DELAWARE, ASSIGNOR OF ONE- I-IALF TO WILLIAMB. CLERK, OF SAME PLACE.

iLEATHER-STAKING MACHINE.

SPECIFICATION forming part of Letters Fatent No. 675,732, dated June 4, 1901.

Application filed January 22 1901. Serial No. 44,295. (No model.)

To ctZZ whom it nutyc'onoern Be it known that I, GEORGE A. HENRY, a citizen of the United States, residing at Wilmington, in the county of Newcastle, State of Delaware, have invented certain new and useful Improvements in Leather-Staking Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to leather-staking machines, and particularly to the construction of machine embodying a staking-blade and gripping-roller.

The invention has for one object to improve the construction of staking-machines heretofore used, in which the felt or rubber roll rested upon a stretchingblade, thereby fre quently injuring the roll'and damaging the hide or skin operated upon. To this end the staking and pressure edges'are herein located at one side of *theigripping-roll and in ad Vance thereof, whereby the contact of-the roll upon the edge of the blade is'prevented.

A further object of the'invention is to pro] vide a plurality of edges, one ofwhich acts upon an extended ar'ear'of the skin to stretch and scrape the same,while the other acts upon a limited area to perform a stretching function under a greater tension than the tension upon the extended area. f

Other objects and advantages of the invention will hereinafter appear in the following description and the novel features thereof will be particularly pointed out in the "appended claims. I p

In the drawings, Figure 1 is alongitudinal section through an ordinaryform of stakingmachine having my invention" applied there to. Fig. 2 is an enlarged elevation of the gripping-roll and cooperating blade. Fig.3 is an elevation of one of th'e'blades. Fig. 4

is a modified formin whichthe pressure andstaking edges are formed from separate plates,

and Fig. 5 isa further modification of such ablade.

Like letters of reference'i'ndicate like parts throughout the several'figur'es of the draw lngs. a f 1 For the purpose of illustrating the application of the present invention I have shown the same in connection with a staking-machine of well-known and ordinary construction, in which the frame A is provided at its upper part with a guideway A, in which'a reciprocating jaw A is adapted to move. vUpon the upper portion of this jaw an oscillating arm A comprising the upper jaw, is pivoted, as .at A For the purposepf reciprocating the jawsa suitable driving-wheel A is mounted in the frame and connected to the jaw A by means of a pitman'A". The end of the upper jaw A is provided with a friction-roll A adapted to ride upon the end A of the pitman, and thus produce the oscillation of the upperjaw against the tension of jaw a gripping-roll B is mounted by means of a bracket B or any other desired device,which roll may be of any preferred materialfor instance, of felt or rubber. At the outer end ,of the lower jaw A the bla'de O is mounted by means of a rod 0, adjustably secured to .the jaws, as shown at C andat the rear of the'blade O a pad 0 is provided, which causes the skin to lie flat against the surface of the roll B." The blade 0 and the pad- 0 are located at'op'posite' sides of the roll B and may be adjusted upon the rods 0 by suitable locknuts, as shown in Fig. 2, so as to vary their relative distance apart dependent upon the diameter of the roll or the character of the material operated upon.

' The blade 0 is provided with an edge D,

comprising a staking or scraping blade.

While in a different horizontal and vertical plane, a pressure edge D"is provided, against mit vertical adjustment thereof, asthis -adjus'tmentmay be used to determine the extent of. contact between the roll B-andthe pressure edge I) whichgovernsYthetension or stretching action in the limited areabetween the staking and pressureedges. v

In' Fig. 4 a modified form is illustrated in which the staking edge D isformed of an independent piece of material from the pressure edge D each of these, as well as those shown in Fig. 2, being beveled upon its up per face, so that the wear from contact with the skin produces a sharpening action and reduces the necessity for removing the edges to a minimum. The edges shown in Fig. 4. may be secured together by any desired means-for instance, a screw or bolt D In the form shown in Fig. 5 the staking edge -D is similar to that shown in Fig. 4, while the pressure edge D has a horizontal upper face. In the scraping action upon the skin a quantity of fine material removed from the skin collects in the space between the staking and pressure edges of the blade, requiring a removal of such material, while the form shown in Fig. 5 does not leave any space for the collection of such material.

In the operation of the machine it will be understood that the end X of the hide or skin is held by any desired means, and as the jaws reciprocate toward this end of the skin the roll B is raised to open the jaws. -When the full forward movement has taken place, the roll descends to grip the skin, as shown in Fig. 1, and d'uring the return reciprocation draws the staking or scraping jaw D of the blade 0 along the surface of the skin to most advantageously effect the stretching and scraping action sought in this class of machine. During this action thepressure edge has, by contact with the roll B, grasped the free end of the skin and exerts thereon a stretching action greater than that between the staking edge and the fixed end of the skin, owing to the extended area of contact of the roll with the face of the pressure edge, thereby extending the area of frictional contact and producing a main stretching and scraping action followed by a stretch under great-er tension in a limited area.

It will be seen that the location of the blade having the staking and pressure edges in advance or at one side of the roll entirely obviates the possibility of the roll bearing upon a blade to puncture or injure either the skin or the elastic material of the roll. It is also apparcut that the location of the two edges immediately adjacent and in different vertical and horizontal planes brings the skin at such an angle over the edges of the blade that a primary stretching and scraping action is secured to the best advantage, while the secondary stretching under greater tension is effected, and the arrangement of parts is such that the roll may move downward, so as to hold the skin into contact with the face of the blade next the pressure edge, and thereby greatly extend the area of frictional contact and the consequent tension of the stretching action. WVhile the blade has been described as adjustable to efiect this extended frictional contact, the same may also be secured by adjusting the extent of movement of the roll by any well-known mechanical expedients, it being preferable that the rollengage the straight face of the pressure edge to the extent found necessary in securing the proper tension for stretching.

It is obvious that changes may be made in the details of construction and configuration of the several parts without departing from the spirit of the invention as defined by the appended claims.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a staking-machine, the combination with a roll, of a blade having independent staking and pressure edges at one side of said roll; substantially as specified.

2. In a staking-machine, the combination with a roll, of a blade having independent staking and pressure edges at one side of said roll, and a pad at the opposite side of said roll at a distance from said blade greater than the diameter of the roll; substantially as specified.

3. Ina staking-machine, a blade having a staking edge and an independent pressure edge in a different vertical and horizontal plane; substantially as specified.

4. In a staking-machine, a blade having a staking edge and an independent pressure edge in a different vertical and horizontal plane, each of said edges having an inclined upper face; substantially as specified.

In testimony whereof I afiix my signature in presence of two witnesses.

GEORGE A. HENRY.

Vitnesses:

D. W. HUGHES, GEORGE W. MORGAN. 

